1 /** 2 * \file psa/crypto_struct.h 3 * 4 * \brief PSA cryptography module: Mbed TLS structured type implementations 5 * 6 * \note This file may not be included directly. Applications must 7 * include psa/crypto.h. 8 * 9 * This file contains the definitions of some data structures with 10 * implementation-specific definitions. 11 * 12 * In implementations with isolation between the application and the 13 * cryptography module, it is expected that the front-end and the back-end 14 * would have different versions of this file. 15 * 16 * <h3>Design notes about multipart operation structures</h3> 17 * 18 * For multipart operations without driver delegation support, each multipart 19 * operation structure contains a `psa_algorithm_t alg` field which indicates 20 * which specific algorithm the structure is for. When the structure is not in 21 * use, `alg` is 0. Most of the structure consists of a union which is 22 * discriminated by `alg`. 23 * 24 * For multipart operations with driver delegation support, each multipart 25 * operation structure contains an `unsigned int id` field indicating which 26 * driver got assigned to do the operation. When the structure is not in use, 27 * 'id' is 0. The structure contains also a driver context which is the union 28 * of the contexts of all drivers able to handle the type of multipart 29 * operation. 30 * 31 * Note that when `alg` or `id` is 0, the content of other fields is undefined. 32 * In particular, it is not guaranteed that a freshly-initialized structure 33 * is all-zero: we initialize structures to something like `{0, 0}`, which 34 * is only guaranteed to initializes the first member of the union; 35 * GCC and Clang initialize the whole structure to 0 (at the time of writing), 36 * but MSVC and CompCert don't. 37 * 38 * In Mbed Crypto, multipart operation structures live independently from 39 * the key. This allows Mbed Crypto to free the key objects when destroying 40 * a key slot. If a multipart operation needs to remember the key after 41 * the setup function returns, the operation structure needs to contain a 42 * copy of the key. 43 */ 44 /* 45 * Copyright The Mbed TLS Contributors 46 * SPDX-License-Identifier: Apache-2.0 47 * 48 * Licensed under the Apache License, Version 2.0 (the "License"); you may 49 * not use this file except in compliance with the License. 50 * You may obtain a copy of the License at 51 * 52 * http://www.apache.org/licenses/LICENSE-2.0 53 * 54 * Unless required by applicable law or agreed to in writing, software 55 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 56 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 57 * See the License for the specific language governing permissions and 58 * limitations under the License. 59 */ 60 61 #ifndef PSA_CRYPTO_STRUCT_H 62 #define PSA_CRYPTO_STRUCT_H 63 #include "mbedtls/private_access.h" 64 65 #ifdef __cplusplus 66 extern "C" { 67 #endif 68 69 /* Include the Mbed TLS configuration file, the way Mbed TLS does it 70 * in each of its header files. */ 71 #include "mbedtls/build_info.h" 72 73 #include "mbedtls/cmac.h" 74 #include "mbedtls/gcm.h" 75 #include "mbedtls/ccm.h" 76 #include "mbedtls/chachapoly.h" 77 78 /* Include the context definition for the compiled-in drivers for the primitive 79 * algorithms. */ 80 #include "psa/crypto_driver_contexts_primitives.h" 81 82 struct psa_hash_operation_s { 83 /** Unique ID indicating which driver got assigned to do the 84 * operation. Since driver contexts are driver-specific, swapping 85 * drivers halfway through the operation is not supported. 86 * ID values are auto-generated in psa_driver_wrappers.h. 87 * ID value zero means the context is not valid or not assigned to 88 * any driver (i.e. the driver context is not active, in use). */ 89 unsigned int MBEDTLS_PRIVATE(id); 90 psa_driver_hash_context_t MBEDTLS_PRIVATE(ctx); 91 }; 92 93 #define PSA_HASH_OPERATION_INIT { 0, { 0 } } 94 static inline struct psa_hash_operation_s psa_hash_operation_init(void) 95 { 96 const struct psa_hash_operation_s v = PSA_HASH_OPERATION_INIT; 97 return v; 98 } 99 100 struct psa_cipher_operation_s { 101 /** Unique ID indicating which driver got assigned to do the 102 * operation. Since driver contexts are driver-specific, swapping 103 * drivers halfway through the operation is not supported. 104 * ID values are auto-generated in psa_crypto_driver_wrappers.h 105 * ID value zero means the context is not valid or not assigned to 106 * any driver (i.e. none of the driver contexts are active). */ 107 unsigned int MBEDTLS_PRIVATE(id); 108 109 unsigned int MBEDTLS_PRIVATE(iv_required) : 1; 110 unsigned int MBEDTLS_PRIVATE(iv_set) : 1; 111 112 uint8_t MBEDTLS_PRIVATE(default_iv_length); 113 114 psa_driver_cipher_context_t MBEDTLS_PRIVATE(ctx); 115 }; 116 117 #define PSA_CIPHER_OPERATION_INIT { 0, 0, 0, 0, { 0 } } 118 static inline struct psa_cipher_operation_s psa_cipher_operation_init(void) 119 { 120 const struct psa_cipher_operation_s v = PSA_CIPHER_OPERATION_INIT; 121 return v; 122 } 123 124 /* Include the context definition for the compiled-in drivers for the composite 125 * algorithms. */ 126 #include "psa/crypto_driver_contexts_composites.h" 127 128 struct psa_mac_operation_s { 129 /** Unique ID indicating which driver got assigned to do the 130 * operation. Since driver contexts are driver-specific, swapping 131 * drivers halfway through the operation is not supported. 132 * ID values are auto-generated in psa_driver_wrappers.h 133 * ID value zero means the context is not valid or not assigned to 134 * any driver (i.e. none of the driver contexts are active). */ 135 unsigned int MBEDTLS_PRIVATE(id); 136 uint8_t MBEDTLS_PRIVATE(mac_size); 137 unsigned int MBEDTLS_PRIVATE(is_sign) : 1; 138 psa_driver_mac_context_t MBEDTLS_PRIVATE(ctx); 139 }; 140 141 #define PSA_MAC_OPERATION_INIT { 0, 0, 0, { 0 } } 142 static inline struct psa_mac_operation_s psa_mac_operation_init(void) 143 { 144 const struct psa_mac_operation_s v = PSA_MAC_OPERATION_INIT; 145 return v; 146 } 147 148 struct psa_aead_operation_s { 149 150 /** Unique ID indicating which driver got assigned to do the 151 * operation. Since driver contexts are driver-specific, swapping 152 * drivers halfway through the operation is not supported. 153 * ID values are auto-generated in psa_crypto_driver_wrappers.h 154 * ID value zero means the context is not valid or not assigned to 155 * any driver (i.e. none of the driver contexts are active). */ 156 unsigned int MBEDTLS_PRIVATE(id); 157 158 psa_algorithm_t MBEDTLS_PRIVATE(alg); 159 psa_key_type_t MBEDTLS_PRIVATE(key_type); 160 161 size_t MBEDTLS_PRIVATE(ad_remaining); 162 size_t MBEDTLS_PRIVATE(body_remaining); 163 164 unsigned int MBEDTLS_PRIVATE(nonce_set) : 1; 165 unsigned int MBEDTLS_PRIVATE(lengths_set) : 1; 166 unsigned int MBEDTLS_PRIVATE(ad_started) : 1; 167 unsigned int MBEDTLS_PRIVATE(body_started) : 1; 168 unsigned int MBEDTLS_PRIVATE(is_encrypt) : 1; 169 170 psa_driver_aead_context_t MBEDTLS_PRIVATE(ctx); 171 }; 172 173 #define PSA_AEAD_OPERATION_INIT { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, { 0 } } 174 static inline struct psa_aead_operation_s psa_aead_operation_init(void) 175 { 176 const struct psa_aead_operation_s v = PSA_AEAD_OPERATION_INIT; 177 return v; 178 } 179 180 #if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF) || \ 181 defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT) || \ 182 defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND) 183 typedef struct { 184 uint8_t *MBEDTLS_PRIVATE(info); 185 size_t MBEDTLS_PRIVATE(info_length); 186 #if PSA_HASH_MAX_SIZE > 0xff 187 #error "PSA_HASH_MAX_SIZE does not fit in uint8_t" 188 #endif 189 uint8_t MBEDTLS_PRIVATE(offset_in_block); 190 uint8_t MBEDTLS_PRIVATE(block_number); 191 unsigned int MBEDTLS_PRIVATE(state) : 2; 192 unsigned int MBEDTLS_PRIVATE(info_set) : 1; 193 uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE]; 194 uint8_t MBEDTLS_PRIVATE(prk)[PSA_HASH_MAX_SIZE]; 195 struct psa_mac_operation_s MBEDTLS_PRIVATE(hmac); 196 } psa_hkdf_key_derivation_t; 197 #endif /* MBEDTLS_PSA_BUILTIN_ALG_HKDF || 198 MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT || 199 MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND */ 200 #if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS) 201 typedef struct { 202 uint8_t MBEDTLS_PRIVATE(data)[PSA_TLS12_ECJPAKE_TO_PMS_DATA_SIZE]; 203 } psa_tls12_ecjpake_to_pms_t; 204 #endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS */ 205 206 #if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || \ 207 defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS) 208 typedef enum { 209 PSA_TLS12_PRF_STATE_INIT, /* no input provided */ 210 PSA_TLS12_PRF_STATE_SEED_SET, /* seed has been set */ 211 PSA_TLS12_PRF_STATE_OTHER_KEY_SET, /* other key has been set - optional */ 212 PSA_TLS12_PRF_STATE_KEY_SET, /* key has been set */ 213 PSA_TLS12_PRF_STATE_LABEL_SET, /* label has been set */ 214 PSA_TLS12_PRF_STATE_OUTPUT /* output has been started */ 215 } psa_tls12_prf_key_derivation_state_t; 216 217 typedef struct psa_tls12_prf_key_derivation_s { 218 #if PSA_HASH_MAX_SIZE > 0xff 219 #error "PSA_HASH_MAX_SIZE does not fit in uint8_t" 220 #endif 221 222 /* Indicates how many bytes in the current HMAC block have 223 * not yet been read by the user. */ 224 uint8_t MBEDTLS_PRIVATE(left_in_block); 225 226 /* The 1-based number of the block. */ 227 uint8_t MBEDTLS_PRIVATE(block_number); 228 229 psa_tls12_prf_key_derivation_state_t MBEDTLS_PRIVATE(state); 230 231 uint8_t *MBEDTLS_PRIVATE(secret); 232 size_t MBEDTLS_PRIVATE(secret_length); 233 uint8_t *MBEDTLS_PRIVATE(seed); 234 size_t MBEDTLS_PRIVATE(seed_length); 235 uint8_t *MBEDTLS_PRIVATE(label); 236 size_t MBEDTLS_PRIVATE(label_length); 237 #if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS) 238 uint8_t *MBEDTLS_PRIVATE(other_secret); 239 size_t MBEDTLS_PRIVATE(other_secret_length); 240 #endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */ 241 242 uint8_t MBEDTLS_PRIVATE(Ai)[PSA_HASH_MAX_SIZE]; 243 244 /* `HMAC_hash( prk, A( i ) + seed )` in the notation of RFC 5246, Sect. 5. */ 245 uint8_t MBEDTLS_PRIVATE(output_block)[PSA_HASH_MAX_SIZE]; 246 } psa_tls12_prf_key_derivation_t; 247 #endif /* MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || 248 * MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS */ 249 250 struct psa_key_derivation_s { 251 psa_algorithm_t MBEDTLS_PRIVATE(alg); 252 unsigned int MBEDTLS_PRIVATE(can_output_key) : 1; 253 size_t MBEDTLS_PRIVATE(capacity); 254 union { 255 /* Make the union non-empty even with no supported algorithms. */ 256 uint8_t MBEDTLS_PRIVATE(dummy); 257 #if defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF) || \ 258 defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXTRACT) || \ 259 defined(MBEDTLS_PSA_BUILTIN_ALG_HKDF_EXPAND) 260 psa_hkdf_key_derivation_t MBEDTLS_PRIVATE(hkdf); 261 #endif 262 #if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PRF) || \ 263 defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_PSK_TO_MS) 264 psa_tls12_prf_key_derivation_t MBEDTLS_PRIVATE(tls12_prf); 265 #endif 266 #if defined(MBEDTLS_PSA_BUILTIN_ALG_TLS12_ECJPAKE_TO_PMS) 267 psa_tls12_ecjpake_to_pms_t MBEDTLS_PRIVATE(tls12_ecjpake_to_pms); 268 #endif 269 } MBEDTLS_PRIVATE(ctx); 270 }; 271 272 /* This only zeroes out the first byte in the union, the rest is unspecified. */ 273 #define PSA_KEY_DERIVATION_OPERATION_INIT { 0, 0, 0, { 0 } } 274 static inline struct psa_key_derivation_s psa_key_derivation_operation_init( 275 void) 276 { 277 const struct psa_key_derivation_s v = PSA_KEY_DERIVATION_OPERATION_INIT; 278 return v; 279 } 280 281 struct psa_key_policy_s { 282 psa_key_usage_t MBEDTLS_PRIVATE(usage); 283 psa_algorithm_t MBEDTLS_PRIVATE(alg); 284 psa_algorithm_t MBEDTLS_PRIVATE(alg2); 285 }; 286 typedef struct psa_key_policy_s psa_key_policy_t; 287 288 #define PSA_KEY_POLICY_INIT { 0, 0, 0 } 289 static inline struct psa_key_policy_s psa_key_policy_init(void) 290 { 291 const struct psa_key_policy_s v = PSA_KEY_POLICY_INIT; 292 return v; 293 } 294 295 /* The type used internally for key sizes. 296 * Public interfaces use size_t, but internally we use a smaller type. */ 297 typedef uint16_t psa_key_bits_t; 298 /* The maximum value of the type used to represent bit-sizes. 299 * This is used to mark an invalid key size. */ 300 #define PSA_KEY_BITS_TOO_LARGE ((psa_key_bits_t) -1) 301 /* The maximum size of a key in bits. 302 * Currently defined as the maximum that can be represented, rounded down 303 * to a whole number of bytes. 304 * This is an uncast value so that it can be used in preprocessor 305 * conditionals. */ 306 #define PSA_MAX_KEY_BITS 0xfff8 307 308 /** A mask of flags that can be stored in key attributes. 309 * 310 * This type is also used internally to store flags in slots. Internal 311 * flags are defined in library/psa_crypto_core.h. Internal flags may have 312 * the same value as external flags if they are properly handled during 313 * key creation and in psa_get_key_attributes. 314 */ 315 typedef uint16_t psa_key_attributes_flag_t; 316 317 #define MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER \ 318 ((psa_key_attributes_flag_t) 0x0001) 319 320 /* A mask of key attribute flags used externally only. 321 * Only meant for internal checks inside the library. */ 322 #define MBEDTLS_PSA_KA_MASK_EXTERNAL_ONLY ( \ 323 MBEDTLS_PSA_KA_FLAG_HAS_SLOT_NUMBER | \ 324 0) 325 326 /* A mask of key attribute flags used both internally and externally. 327 * Currently there aren't any. */ 328 #define MBEDTLS_PSA_KA_MASK_DUAL_USE ( \ 329 0) 330 331 typedef struct { 332 psa_key_type_t MBEDTLS_PRIVATE(type); 333 psa_key_bits_t MBEDTLS_PRIVATE(bits); 334 psa_key_lifetime_t MBEDTLS_PRIVATE(lifetime); 335 mbedtls_svc_key_id_t MBEDTLS_PRIVATE(id); 336 psa_key_policy_t MBEDTLS_PRIVATE(policy); 337 psa_key_attributes_flag_t MBEDTLS_PRIVATE(flags); 338 } psa_core_key_attributes_t; 339 340 #define PSA_CORE_KEY_ATTRIBUTES_INIT { PSA_KEY_TYPE_NONE, 0, \ 341 PSA_KEY_LIFETIME_VOLATILE, \ 342 MBEDTLS_SVC_KEY_ID_INIT, \ 343 PSA_KEY_POLICY_INIT, 0 } 344 345 struct psa_key_attributes_s { 346 psa_core_key_attributes_t MBEDTLS_PRIVATE(core); 347 #if defined(MBEDTLS_PSA_CRYPTO_SE_C) 348 psa_key_slot_number_t MBEDTLS_PRIVATE(slot_number); 349 #endif /* MBEDTLS_PSA_CRYPTO_SE_C */ 350 void *MBEDTLS_PRIVATE(domain_parameters); 351 size_t MBEDTLS_PRIVATE(domain_parameters_size); 352 }; 353 354 #if defined(MBEDTLS_PSA_CRYPTO_SE_C) 355 #define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, 0, NULL, 0 } 356 #else 357 #define PSA_KEY_ATTRIBUTES_INIT { PSA_CORE_KEY_ATTRIBUTES_INIT, NULL, 0 } 358 #endif 359 360 static inline struct psa_key_attributes_s psa_key_attributes_init(void) 361 { 362 const struct psa_key_attributes_s v = PSA_KEY_ATTRIBUTES_INIT; 363 return v; 364 } 365 366 static inline void psa_set_key_id(psa_key_attributes_t *attributes, 367 mbedtls_svc_key_id_t key) 368 { 369 psa_key_lifetime_t lifetime = attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime); 370 371 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) = key; 372 373 if (PSA_KEY_LIFETIME_IS_VOLATILE(lifetime)) { 374 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) = 375 PSA_KEY_LIFETIME_FROM_PERSISTENCE_AND_LOCATION( 376 PSA_KEY_LIFETIME_PERSISTENT, 377 PSA_KEY_LIFETIME_GET_LOCATION(lifetime)); 378 } 379 } 380 381 static inline mbedtls_svc_key_id_t psa_get_key_id( 382 const psa_key_attributes_t *attributes) 383 { 384 return attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id); 385 } 386 387 #ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER 388 static inline void mbedtls_set_key_owner_id(psa_key_attributes_t *attributes, 389 mbedtls_key_owner_id_t owner) 390 { 391 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(owner) = owner; 392 } 393 #endif 394 395 static inline void psa_set_key_lifetime(psa_key_attributes_t *attributes, 396 psa_key_lifetime_t lifetime) 397 { 398 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime) = lifetime; 399 if (PSA_KEY_LIFETIME_IS_VOLATILE(lifetime)) { 400 #ifdef MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER 401 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id).MBEDTLS_PRIVATE(key_id) = 0; 402 #else 403 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(id) = 0; 404 #endif 405 } 406 } 407 408 static inline psa_key_lifetime_t psa_get_key_lifetime( 409 const psa_key_attributes_t *attributes) 410 { 411 return attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(lifetime); 412 } 413 414 static inline void psa_extend_key_usage_flags(psa_key_usage_t *usage_flags) 415 { 416 if (*usage_flags & PSA_KEY_USAGE_SIGN_HASH) { 417 *usage_flags |= PSA_KEY_USAGE_SIGN_MESSAGE; 418 } 419 420 if (*usage_flags & PSA_KEY_USAGE_VERIFY_HASH) { 421 *usage_flags |= PSA_KEY_USAGE_VERIFY_MESSAGE; 422 } 423 } 424 425 static inline void psa_set_key_usage_flags(psa_key_attributes_t *attributes, 426 psa_key_usage_t usage_flags) 427 { 428 psa_extend_key_usage_flags(&usage_flags); 429 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(usage) = usage_flags; 430 } 431 432 static inline psa_key_usage_t psa_get_key_usage_flags( 433 const psa_key_attributes_t *attributes) 434 { 435 return attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(usage); 436 } 437 438 static inline void psa_set_key_algorithm(psa_key_attributes_t *attributes, 439 psa_algorithm_t alg) 440 { 441 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg) = alg; 442 } 443 444 static inline psa_algorithm_t psa_get_key_algorithm( 445 const psa_key_attributes_t *attributes) 446 { 447 return attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(policy).MBEDTLS_PRIVATE(alg); 448 } 449 450 /* This function is declared in crypto_extra.h, which comes after this 451 * header file, but we need the function here, so repeat the declaration. */ 452 psa_status_t psa_set_key_domain_parameters(psa_key_attributes_t *attributes, 453 psa_key_type_t type, 454 const uint8_t *data, 455 size_t data_length); 456 457 static inline void psa_set_key_type(psa_key_attributes_t *attributes, 458 psa_key_type_t type) 459 { 460 if (attributes->MBEDTLS_PRIVATE(domain_parameters) == NULL) { 461 /* Common case: quick path */ 462 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(type) = type; 463 } else { 464 /* Call the bigger function to free the old domain parameters. 465 * Ignore any errors which may arise due to type requiring 466 * non-default domain parameters, since this function can't 467 * report errors. */ 468 (void) psa_set_key_domain_parameters(attributes, type, NULL, 0); 469 } 470 } 471 472 static inline psa_key_type_t psa_get_key_type( 473 const psa_key_attributes_t *attributes) 474 { 475 return attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(type); 476 } 477 478 static inline void psa_set_key_bits(psa_key_attributes_t *attributes, 479 size_t bits) 480 { 481 if (bits > PSA_MAX_KEY_BITS) { 482 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) = PSA_KEY_BITS_TOO_LARGE; 483 } else { 484 attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits) = (psa_key_bits_t) bits; 485 } 486 } 487 488 static inline size_t psa_get_key_bits( 489 const psa_key_attributes_t *attributes) 490 { 491 return attributes->MBEDTLS_PRIVATE(core).MBEDTLS_PRIVATE(bits); 492 } 493 494 /** 495 * \brief The context for PSA interruptible hash signing. 496 */ 497 struct psa_sign_hash_interruptible_operation_s { 498 /** Unique ID indicating which driver got assigned to do the 499 * operation. Since driver contexts are driver-specific, swapping 500 * drivers halfway through the operation is not supported. 501 * ID values are auto-generated in psa_crypto_driver_wrappers.h 502 * ID value zero means the context is not valid or not assigned to 503 * any driver (i.e. none of the driver contexts are active). */ 504 unsigned int MBEDTLS_PRIVATE(id); 505 506 psa_driver_sign_hash_interruptible_context_t MBEDTLS_PRIVATE(ctx); 507 508 unsigned int MBEDTLS_PRIVATE(error_occurred) : 1; 509 510 uint32_t MBEDTLS_PRIVATE(num_ops); 511 }; 512 513 #define PSA_SIGN_HASH_INTERRUPTIBLE_OPERATION_INIT { 0, { 0 }, 0, 0 } 514 515 static inline struct psa_sign_hash_interruptible_operation_s 516 psa_sign_hash_interruptible_operation_init(void) 517 { 518 const struct psa_sign_hash_interruptible_operation_s v = 519 PSA_SIGN_HASH_INTERRUPTIBLE_OPERATION_INIT; 520 521 return v; 522 } 523 524 /** 525 * \brief The context for PSA interruptible hash verification. 526 */ 527 struct psa_verify_hash_interruptible_operation_s { 528 /** Unique ID indicating which driver got assigned to do the 529 * operation. Since driver contexts are driver-specific, swapping 530 * drivers halfway through the operation is not supported. 531 * ID values are auto-generated in psa_crypto_driver_wrappers.h 532 * ID value zero means the context is not valid or not assigned to 533 * any driver (i.e. none of the driver contexts are active). */ 534 unsigned int MBEDTLS_PRIVATE(id); 535 536 psa_driver_verify_hash_interruptible_context_t MBEDTLS_PRIVATE(ctx); 537 538 unsigned int MBEDTLS_PRIVATE(error_occurred) : 1; 539 540 uint32_t MBEDTLS_PRIVATE(num_ops); 541 }; 542 543 #define PSA_VERIFY_HASH_INTERRUPTIBLE_OPERATION_INIT { 0, { 0 }, 0, 0 } 544 545 static inline struct psa_verify_hash_interruptible_operation_s 546 psa_verify_hash_interruptible_operation_init(void) 547 { 548 const struct psa_verify_hash_interruptible_operation_s v = 549 PSA_VERIFY_HASH_INTERRUPTIBLE_OPERATION_INIT; 550 551 return v; 552 } 553 554 #ifdef __cplusplus 555 } 556 #endif 557 558 #endif /* PSA_CRYPTO_STRUCT_H */ 559